Can't speak from personal experience, as I don't have one. Internet stories say some shoot great, others need some degree of work. Still others need to go back to Century for replacement.

Pricewise, the 30-rounder is probably a $50 deal, assuming it's from FN or another equivalent European contractor. Forget it if its from USA Mags or similar. The 20's can be gotten all day in great shape for $5 or so.

If your friend saves up another $250 or so, he's easily into a DS Arms STG-58; which is the road I'd take.